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<html lang="zh-CN">

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    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        /* 我们页面 50*50的盒子 转换为vw */
        /* iPhone6 视口 375px 1vw = 3.75 */
        div {
            /* width: 50px/3.75; */
            width: 13.3333vw;
            height: 13.3333vw;
            background-color: pink;
            font-size: 5.3333vw;
        }
    </style>
</head>

<body>
    <div>
        pink老师真帅
    </div>
</body>

</html>